Drill chuck



Dec. 4, 1928. 1,693,823

w. SHORE Filed Sept. 11, 1924 I/v VE/V Tali. W/LL/ 5/1005.

BY [/15 TOIYNEY.

Patented Dec. 4, 1928.

WILLIAM snonn, or MINNEAPOLIS, nmlvnso'rn.

DRILL canon;

Application filed September This invention has for itsmain object to provide a rugged and compact chuck for drill presses, which will accommodate and hold drills of various sizes and which maybe easily and quickly manipulated to engage a drill or release the same.

More specifically, it is an "objectin such a drill chuck to provide a compacthead comprising a casing and an eccentrically aligned revolubledrill-holding cylinder therein having a plurality of shank socketscapable of being aligned with theaxis of the head.

It is a further object to providemeansfor automatically aligning a desired drill socket in properworking position; An additional object in this device is to provide efiicien't means for ejecting a drill from any one of the shank sockets in case it has become tightly wedged therein. i i A still additional feature of the Invention is to provide such a drill chuck in which manipulation of the revolublecylinder, as well as the ejecting device may be efiecte by a single tool or key of small size. I

These and other objects and advantages of the invention ,will beapparent from the following description made in connection with the accompanying drawings, whereinout the several views, and in which,

Fig. '1 is a view partly in sideelevation and partly in section of thedevice with some partsbrokenaway; g

Fig. 2 is ahorizontal sectiontaken on the line 2 2 of Fig. 1, looking downwardly j" E like characters refer to similar parts through- Fig. 3 is a horizontal sectiontaken on the .line 3-3 of Fig. 1, looking upwardly; and Fig. 418.2111 enlarged elevation of the key or manipulating tool employed.

- A rugged. substantially cylindrical body member or casing 5 is provided having the usual upstanding attachingshank 6 in alignment-therewith for; connection with a drill brace; Acylindrical recess is bored fromj the bottom of casing 5.1eccentrically aligned therewith and 'preferablyfhaving a 'circu'mfer'ence internally tangentialto the circumference of said casing. Alongitudinal slot is provided along the side of the casing about the line of tangency of the circumference of the recess with the circumference of the cas ing,.{ and, acircumferentialslot 7 is provided at one side of said longitudinal slot communicating therewith and extending slightly less than onesfourth, ofthe distancearound portions 11 of the sockets. Seats or recesses 11, 1924. Serial no. 737,066.

said casing. A drill-holding cylinder 8 is disposed in said. recess, capable of revolution therein and having a portion of its periphery extending through the lon itudinal slot in casing 5 to permit access from the outside thereof, and is held in said recess by a bottom plate 9 securedto the bottom of cylinder 8 by small screws 10 and havingv an opening of slightly smaller diameter than said cylin- I deraligned with the axis thereof. The revo luble cylinder 8 is provided with a plurality V of,preferably tl1re e,longitudinal drill sockets 11. having their several centers inthe circumference of a circle centered about the axis of said cylinder, the circumference of said circle also passingthrough the aXisof the casing 5 p v and attaching shank 6. g V I From this arrangementand structure, it may readily be seen that, by properly revolvingthe cylinder 8, any one of the-drill sockets jll may be precisely aligned with the axis of easing 5 in proper working position. To hold the cylinder in a desired alignedposi- 'tion, a set screw 12. is provided in the side of if casing 5 engaging spaced sockets 13 in align- 'inenttherewith on the circumference of the fcylinder. The drill sockets 11 are preferably longitudinally tapered to the standard drill shanks having, at their upper ends, shouldered portions or flanges' ll'adapted to accommodate the diminishedfiat ends of a drill 14; Radial slots 15 are providedin the periphery'of the cylinder 8, near the top thereof, in respective alignment with; the top 16 are bored from the top ofcylinder 8 in alignment with and communicating with the top. of the respective sockets 11 and are adapted to hold fianged thumbs or ejecting members 17 capable ofbeing projected into the top of sockets 11. A second setscrew 18 is threaded into the top ofcasin'g 5 in alignment with a point on the circumferenceof thecir'cle in which the centers of sockets 11 lie by whichs'et screw the ejecting members 17 may be actuated, when the cylinder is revolved to align one of the same therewith. pluralityof circu 'nferentially spaced holes, 8, there being one for each drill socket, isma-de on the periphery of cylinder 8, in alignment with the circumferential slot 7. These holes are adapted to receive the "cylindrical end 19 of a key'or lever 19, whichis adapted .to'

be inserted through said slot v7. therein. This key, when circumferentially pulled to the exa tremeend of slot 7, the set screw 12 being released from engagement with one of the sock:

ets 13, will precisely. align one of thefdrill sockets 11 with the axis of the casing and be in proper receptiveposition for the shank of aproper sized drilhthe cndot said slot limiting the swing of key 19. When ade sired drill socket is-thus aligned, one of, the

:be appliedto the key to plroperly adjust said set: screws.

O ea'ataen.

l "Iheoperation is probably obvious fronithe foregoing description, but maybe briefly suin- The setscrew I2 is first'released from ongagement with cylinder 8,;by'n1eans ofthe 1 tool 19 whenthe cylindrical end19 of said tool is inserted inone of the spaced holes 8* accessible through thelongitudinal slot on said casingand the key then. pulled to the end of the circun'iferenti'al slot 7. This will 1 alignfone of the drill. sockets llvwith the axis of the drill chuck, which may be observed ,from the opening in the bottom plate 9. This operation may be repeated until the desired drill socket 11 is in proper alignment, when the set screw 12 will be turned with the end 19' of the key and the shank of the drill 11 inserted in said socket. A

When it is wished to take out the drill 1.4,

the set screw is first unscrewed andthe cylinder 8 revolved by turning the same with the thumb through the longitudinalslot on casing 5 until the socket llengagingthe drill V is in alignment with the set screw 18.1, 1 This alignment may be observed through one of the radial slots 15 in the side of cylinder 8. The set screw 18 is then screwed down with the end 19 of key 19, whereupon the ejecting member or thumb 17 will be projected downwardly and against theupper end of the drill shank ejecting thesame from socket 11.

Yes

The radial slots 15 are of such sizeand shape thatwedge members may be inserted'through,

if necessary, in theeustomary inanner'to eject the drills, in case the ejecting members 17 cannot reach the ends of a short drill shank.

From the foregoing description, it is seen that the nventor has devised anextremely simplebut highly efficient drill chuck capable of instantaneous adjustment to receive drills of various sizes. The chuck is ruggedly built and extremely compacthaving an out sideldiameter of only three inches and a hei 'ht ofapproximately four and one-halt inc es. The standard drills, running'from socket disposed. longitudina der, means by j which saidcylinder may be turned, and stop means on slaidfbody engage thrce-ei'ghths of an inch to one and one-fourth inches 1 n thaineter, have but three drfierent sized shanks, which shanks the sockets 11 are adapted to accommodate. This chuck, thereytere, as illustrated viiuflthe preferred form, may be used on all drills within this range The entire manipulation of the dcvice maybe affected, including the locking of the parts in alignment and ejecting of the, drills by ineansot a single keyor tool, thus minimizing the parts? and rendering convenience to the operators j i just The invention COIlSlStSQIIl extremely few parts, the essential ones beingmerely the easing and the drill-holding cylinder 8 revoluble therein, andthe revolution of'this cylinder by the automatic aligningmeans'isthe only requisite necessary to prepare the chuck for i the reception of a desired size drill.

y The device has been pnt to' extensive shop usage and-has been found very eiiicient torthe purposesenumerated, meeting with w de ac cord bythe users thereof.

Atthe present time, most drills in usage require separate sleev'esto be employed in order that the drillmay be; inserted in a drill brace. Thus sleeve 1s required for,

each sized drill. This inventionobviously,

doesaway with the necessity'of several sleevesby providing the severalsized sockets in which the shanks of the drills, themselves, areadz tptedto beseated. w V

It is to be understood that considerable 1 changes maybe ma dein the form, detailsyand arrangement iof parts, without departing from the scope of the invention. j

What Ifclaim is j 1 'Adrill chuck comprisinga substantially cylindrical body member, a revolublecylin- 4 der having an! eeeentricalllly located Ldrill able by said first mentioned means to-limit the movement Toff said cylinder, whereby said ,cylinderwill beldisposed in positionto-hold a drill substantially in axial alignment with said bodym'ember when said step meansis engaged, y c

' 2. A drill chuck comprising a substantially "cylindrical bo dy member, a revoluble cylinder eccentrically mounted therein, said cylinable by said first mentionedmeansto limit-the movementof said cylinder and to axially 5 alinejsaid drill socket withsaid passage.

3; A drill chuckcomprisinga substantially longitudinally and ee'centrically disposed of said cylin- "der having an eccentrically,disposedjdrill V 1socket"axially disposed,apassageinfsaidhody 5 member communicating; with one end of said cylinder, meahsfconneetible with said cylin- .der by Which saidjcylinder may be turned,

and stop means on saidbody memberjengagecylindricallbo'dy member, a r'evoluble .cylinj der eccentrically mounted therein having a o.

drill socket, an arm connectible radiall with said cylinder throu h a slot in said b0 y and by which said cylinder may be turned through partial revolution, the movement of said arm being limited by the ends of said slot, whereby said drill socket will be axially alined with said body when said arm is in one exa treme position. 4. A drill chuck comprising a substantially V cylindrical body member, a revoluble cylinder mounted therein having'an eccentrically and longitudinally disposed drill socket, means by which sald cylinder may be turned, and means for limiting the movement of said first mentioned means, ejecting means" adjacent one end of sald body member -d1sposed eccentrically of. the axis thereof, said stop means adapted to cause said drill socket to be substantially alined with said ejecting means when said first mentioned means are 1 7 moved toextreme position 1n one direction.

5. A drill chuck comprising a substantially cylindrical body member, a revoluble cylinder eccentrically mounted therein and having an eccentrically and longitudinally disposed drill socket, ejectingmeans carried by'said body member and disposed eccentrically to the axis thereof, means by which said cylin der may be turned and means engageable by said first mentioned means for limiting the.

movement of said cylinder in both directions, whereby when moved to one extreme position, said drill socket will be a'lined with the axis of said body member and when moved to the opposite extreme position said drill socket will be alined with said ejectlng means.

' 6. Adrill chuck comprising a substantially cylindrical body member provided with an eccentrically alined cylindrical recess, a rev- 'oluble cylinder mounted in said recessed portion having an eccentrically and longitudinally disposed drill socket, an axial passage 7 in the bottom of said body member 'communieating withone end of said cylinder, ejectmovement of said arm in both directions" whereby when'said arm is moved to one extreme position said drill socket will be sub stantially alined with said axial passage-in said body member and when moved to the opposite extreme position said drill socket will be substantially alined withsaid ejecting IllGtLIlS.

7 A drill chuck comprising a casing, a rev- 7 olublei cylindermounted therein having an eccentric-ally and longitudinally disposed drill socket, a depr'essible member mounted in one end of said casing, an ejecting member mounted in one end of said drill socket, and

means for alining said depressible member with said ejecting member,

In testimony whereof I aflix my signature. I WILLIAM'SHORE. 

